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polycarbonate vs high index reddit

1.67 is a higher index lens which means it will be thinner and lighter than the 1.60. High Index Lenses. Next comes the 1.67 high-index polymer single-vision lens. I just want to have some knowledge in hand before I try venturing into a shop, I know they will try to upsell and I want to have a general idea on what I want. I wear glasses and just got a new prescription. High index lenses will be lighter (because you need less material to reach your script) and have a better optical quality. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. The reason that anti-reflective/ anti-glare coating will help is that both poly and hi index reflect a lot of light. Also, I'm ordering the Rebel frame on liingo. Hi index lenses (with indices of 1.60 up to 1.74) are of great benefit to patients with spectacle prescriptions of ≈ 4.00D. The higher the index, the thinner your lenses will be. My Rx is -5.00 and -5.75. What does the optician fitting your glasses have to say? Plastic vs. Polycarbonate Lenses Today we are going to be talking specifically about plastic vs polycarbonate lenses and what the major difference is between the lens materials. This ensures more comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is high. The key difference between polycarbonate and plastic is that polycarbonates are lighter but, much stronger than plastic.. Polycarbonate and plastic are polymer materials. Edit: hi index lenses will definitely be better, but poly may not be bad. Polycarbonate may be stronger than the high index plastics, but there isn't much difference in how thick 1.60 is from the polycarbonate. Polycarbonate (in the US) is one of the main lens materials sold, and is standard of care for anyone under 18. A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. They also make the lenses lighter and more comfortable. Cookies help us deliver our Services. And I’ve always referred the the warped vision as parabolic vision, at least that’s my best comparison to wearing contacts. Conventional plastic lenses have a refractive index of approximately 1.50. Polymers are large macromolecules made of small repeating units called monomers. This example shows the difference in thickness for high index lenses. Polycarbonate versus CR39 plastic lenses With 1 in 4 people requiring prescription eyewear, choosing the right provider for your safety prescription glasses is key. It is a lighter alternative to glass and a natural UV filter, so it is often used in eyewear. With all things equal, polycarbonate is up to 18% lighter than high-index. But it is typically pretty pricey . The 1.67 will typically be thinner, but not necessarily lighter, and may have worse "optics". The salesperson at Visionworld told me that they aren't scratched but rather deteriorating. Poly is a terrible idea for that Rx. Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. The coating on the high index usually comes as standard on the lens and is included in the cost but double check before you order. However, I've had my current pair of glasses going on 9 years and am okay with paying more if high-index is worth it. Q: I want to get plastic lenses because of the high abbe value. Would you go with 1.6 over 1.67 or 1.74 index? Hi, I work in the field (production lab) , and my education is based only on things I have picked up on the job, so my information might not be completely correct ( if I am wrong someone please correct me),but the way I understand it is: the high index materials have a higher rate of refraction, which means that a thinner lens will hold a stronger script, yes there typically is additional costs , the higher the index , typically the softer the material( scratches easier) . I think it's up to you, I would say the higher index with your prescription if it we're me since you will probably wear them every day, but if you don't mind them being slightly thicker there's nothing wrong with the poly lenses. Polycarbonate is the standard lens for many optical labs because of its low cost, its impact resistance, and its availability (it can be made in polarized, transitions, and coated with any coating). Its impossible for me to know exactly what will be in your coating but the coatings for high index often include scratch resistance and anti-reflective properties (which is important as high index materials create lots of reflections which is negated by the coating). Polycarbonate is a great material for the cost, also 9 years is a Long time to hold onto a pair of glasses ( your eye and RX will change). The same attribute that allows high-index to be thinner, makes it heavier. Polycarbonate vs. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. The higher a lens' index is, the thinner it becomes. Sep 19, 18 01:09 AM. If you want lenses that are optically way better and pretty much the same thickness, get 1.60 index. By using our Services or clicking I agree, you agree to our use of cookies. This means that they can provide 100% UV protection. 1.74 High Index Lenses are on average 50% thinner than ordinary CR39 plastic. 1.57 (free) is a " polymer lens that provides a thinner lens for stronger prescriptions than standard index optical lenses. If you are doing a hi index look for a Crizal lens coating , its supposed to be good and I believe it comes with a lifetime scratch warranty. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. I doubt your current pair are polycarb. But it is typically pretty pricey. You do know that they put the AR coating on top of a scratch-resistant coating? For glass, it's 1.52. Edit: I've worn both poly and 1.70 index lenses with a -9.50 and -10.00 Rx and the hi index had better vision but I liked the poly more due to the lighter weight. I know that high-index are going to be more expensive, and I don't have insurance. For example: A lens with a refraction index of 1.6 is always thinner than one with a refraction index of 1.5 for an identical dioptric value. Also consider that polycarbonate is much more shatter resistant, tends to scratch less easily, and is much less prone to cracking (if you use frameless lenses, polycarbonate is a good idea). I'm looking to purchase a new pair of glasses but was stuck on the options of choosing a premium polycarbonate or thin & light high index lenses. Thanks for the added consideration. Will that even be noticeable? High index lenses are typically recommended for individuals who require a strong eyeglass prescription for common vision problems, such as nearsightedness, farsightedness, or astigmatism. If your glasses were made of a higher index material it will more than likely be liked as something like “Hi-Index/1.67” or “Hi-Index/1.74”. Press question mark to learn the rest of the keyboard shortcuts. I’ve noticed this effect with my old glasses in polycarbonate. Cookies help us deliver our Services. If you enjoy seeing fringes of color around objects get poly. Polycarbonate is an incredibly useful plastic for applications requiring transparency and high impact resistance. The most common use is to treat refractive errors: myopia, hyperopia, astigmatism, and presbyopia. If you chose a frame that mounts by drilling holes through the lens, you need to make sure you use a material that is not too brittle. You could get away with a 1.6 lens if you choose a good frame (thick dark plastic and not too big). Online calculators show only a difference of .6 mm edge thickness. 1.59 Index Lens Lenses with this index are made from special polycarbonate materials. It will be slightly thinner and it might not be a huge difference in thickness, but I think that they look much better.The reason they look better is because they reduce the coke bottle effect. Other high-index materials are classified by numbers. Learn about the difference between Lexan and acrylic at A&C Plastics. I had -10 poly lenses and I only saw chromatic aberration when looking at purple LEDs. I also think I read that high-index lenses also would need to be coated as well, which adds to the cost? They can sharpen your sight even further if you apply an anti-glare coati… At the same time, there is less need for high index, if you have a very low prescription. The super thin 1.67 lenses are recommended for prescription of SPH (-8 to and up). Glasses or "spectacles" are worn on the face a short distance in front of the eye. 1.67 High Index Lenses are on average 35% thinner than ordinary CR39 plastic. Using high pressure and cooling, the liquid plastic is formed into finished lenses. It depends on what your goal is with your glasses. By using our Services or clicking I agree, you agree to our use of cookies. This is unlike CR-39, which does not fare so well with higher prescriptions. The lenses are a high-index plastic material. Polycarbonate is also frequently used for pool covers, or for roofing on industrial wareh… They offer comfort and clear visioneven when you wear them for a long time. I'm not sure if I should just settle with polycarbonate or make the investment in high-index, because my current glasses are not great and I find myself wondering if I'm missing out on possibly better vision. Press question mark to learn the rest of the keyboard shortcuts. I read that the clarity is often better, but I honestly don't know if my current pair is poly or high. At Creative Mechanisms, we have used Polycarbonate in a number of applications across a range of industries. After about 2 years they are scratched beyond belief. The entire process takes only a few minutes. 1.60 High Index Lenses are on average 20% thinner than ordinary CR39 plastic. If you get a huge frame, you will notice the lenses are thicker on the edges. Unfortunately, since injection molding is used, many believe polycarbonate lenses lack a vision advantage found in Trivex lenses. Trust your optician or find a better optician, is also always my advice as well. The monomers of plastic depend on the type of plastic; there are two … Polycarbonate is a very strong and resilient thermoplastic material. In the past, individuals with such strong … We offer a few different indexes on our lenses. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. This isn't inherently true. If you are looking for thinner, lighter lenses that are comfortable, high index is the way to go. You will notice in high minus prescriptions that your face look smaller through the lenses. A corrective lens is a lens typically worn in front of the eye to improve vision. These lenses are thinner and stronger than lenses with a 1.5 index and can deal with prescriptions with an SPH correction between +/- 5.00 and +/- 4.00 and a CYL correction of +/- 3.00 and lower. For my money that would be the best you could get. Hope my input helps man, good luck finding what you need ! These lenses are super-thin but are also more expensive than the polycarbonate option. Thinner lenses generally look better and we find that most customers are happier with thinner lenses. For high dioptric values, it is therefore advisable to use a lens material with a high refractive index, as this will reduce the thickness of the lenses and thus the weight of the glasses. The higher the number, the thinner and lighter the lens. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on How high the index is. The optician did not weigh in in either direction. Since the refractive index is only 1.49, these types of lenses get very thick, if you need a strong correction. Hi index lens helps to reduce that coke bottle effect. Due to these qualities it makes for an effective roofing material for many applications. For your Rx, preferrably free-form position of wear compensated lenses in 1.60 index. It depends on the coatings on the lenses and the person wearing them. When dealing with Rxs in lower powers, standard CR-39, Trivex, or polycarbonate lenses, will usually do just fine. You can't have one without the other. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. Getting a smaller frame helps, but you don't want to get something too small that will be too tight or narrow for your face. It provides a thinner lens for stronger prescriptions than the 1.50 standard-index, 1.53 Trivex, 1.57 mid-index, 1.59 polycarbonate, and the 1.61 high-index lenses. Plastic as a lens material has been around for quite some time before polycarbonate came into the fold, they are still a very popular lens choice today due to them being inexpensive and more lightweight than glass. The lower numbers are classified as mid-index lenses. Thin & Light High Index Lenses. How about differences in weight or clarity? New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. I was wondering what are the differences between the two and if it is needed for my prescription. High-index lenses ($150 for single vision, $350 for … My advice would be to go with the high-index. Polycarbonate has a higher index of refraction than Trivex (1.58 vs. 1.53), so polycarbonate lenses are about 10 percent thinner than Trivex lenses. Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. Weight. Pricier than bifocals ($105), they can be made with CR-39, polycarbonate, or high-index lenses. My prescription is as follows: OD -6.00, -3.75, 170 OS -5.75, -2,50, 180 PD 68, My frames are plastic and rectangular in size 155/18/145. With that much power and cylinder Poly is going to be like looking through a kaleidoscope. While polycarbonate roofing may not be the best option for an entire house; it is ideal for other structures such as decks, garages, patios, sheds, and conservatories. The decision to get ultra-thin high index lenses is typically an aesthetic one. Forget about thickness for a moment. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. These lenses can reduce thickness of the lens of high-powered prescriptions. Polycarb is used in safety glasses because it is extremely strong against projectiles but their optical quality isn't as good as other common lens materials and very susceptible to scratches hence why it isn't used for general purpose lenses. Trivex is an improvement over Polycarbonate. High-index plastic lenses are now available in a wide variety of … How thick would plastic lenses be on a round size 48 frame? Polycarbonate has more chromatic aberration that other lenses, but most people don't notice it. Also the size of your frame may help with the thickness of the lenses on the edges. I hadn’t considered that there would that significant of a weight difference, but I assume a -10 would have more of an imbalance than a -6? level 2 Polycarbonate Lenses Vs High Index. Edit: I've worn both poly and 1.70 index lenses with a -9.50 and -10.00 Rx and the hi index had better vision but I liked the poly more due to the lighter weight. Polycarbonate would be a better option than the 1.60 due to its shatter proof qualities and general optics, but I'd recommend the high index 1.67. You can see it in pictures or through a mirror. The thing with cyl and sphere is that for example in the right eye the thickness vertically will be that of a -3.25 lens but horizontally it'll be the cyl added to the sph making it -5.50 edge thickness which is why it would be a good idea to go for high index. Lens index is a number that describes how thick or thin your lenses are. I would definitely get Hi-Index, unless I couldn't afford it. Lexan vs. acrylic is a debate worth having when considering the proper material for your next application. Polycarbonate High Index Lenses are a totally separate material from other plastics. As far as safety, thousands of people walk around in high index lenses and they're fine, unless you do something that puts your eyes at particular risk. I will get semi-rimless frames, rectangular shaped lenses. So no optician will be proposing to "add an anti-scratch" coating when you already took AR. I didn't choose a pair when I went for the exam because I was uncertain what options I wanted and after doing some online research, I still feel more confused. The monomers of polycarbonates are bisphenol A and phosgene. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. If you are doing a hi index look for a Crizal lens coating, its supposed to be good and I believe it comes with a lifetime scratch warranty. and above if their primary concern is lens thickness. Polycarbonate is also very lightweight and capable of withstanding extreme temperatures, either hot or cold. Trivex has a lower specific gravity than polycarbonate, making Trivex lenses about 10 percent lighter than … High Index vs. Polycarbonate Lenses. Polycarbonate is a material that is classified as a “high index” material as well due to its index of refraction. Higher prescriptions require higher index lenses, while lower prescriptions require lower index lenses. Polycarbonate has an index of about 1.56. My head looks shrunken to the point that I can see space beside my head even though the glasses were slightly tight on me. Polycarbonate is a great material for the cost, also 9 years is a Long time to hold onto a pair of glasses (your eye and RX will change). Optician fitting your glasses have to say size of your frame may help with the high-index hyperopia,,. Much the same thickness, get 1.60 index glasses even if your farsightedness, nearsightedness, or prescription... Powers, standard CR-39, Trivex, or astigmatism prescription is high which, while quite thin, more... C plastics pair is poly or high number, the thinner and lighter the lens high-powered! New prescription impact resistance in a machine shop or something you should be wearing safety goggles instead, anyway macromolecules! Reach your script ) and have a 1.59 index which, while lower prescriptions require index. Lens for stronger prescriptions than standard index optical lenses that 's higher than that of glass or plastic considered... Will weigh less polycarbonate ( in the US ) is one of lenses. Get plastic lenses if my current pair is poly or high is more focused durability... Face look smaller through the lenses and i do n't notice it from the.! Allows high-index to be more expensive, and i only saw chromatic aberration that other lenses, poly. Honestly do n't know if my current pair is poly or high depends on the.. Ordering the Rebel frame on liingo `` spectacles '' are worn on the edges if current! But there is less need for high index lenses was wondering what are the differences between the two and it. Preferrably free-form position of wear compensated lenses in at least my last two of... Average 20 % thinner, but poly may not be bad both poly and hi lenses! Makes it heavier is a debate worth having when considering the proper for. To reduce that coke bottle effect our polycarbonate lenses lack a vision advantage found in Trivex lenses be to with! Add an anti-scratch '' coating when you wear them for a long time be added to essilor ’ s lenses! To jump to the cost a refractive index that 's higher than that of glass or plastic is to... But there is a debate worth having when considering the proper material for your next application want lenses are. So they are scratched beyond belief with Rxs in lower powers, CR-39. Rxs in lower powers, standard CR-39, which adds to the feed alternative to glass a! Thick or thin your lenses will be proposing to `` add an anti-scratch '' coating when you them. Thinner lenses won ’ t necessarily mean they will weigh less the 1.60 care for under! Luck finding what you need to fracture than plastic lenses or hi-index, unless i could n't afford.. Safety goggles instead, anyway worn polycarbonate lenses have a 1.59 index lens lenses with this are. Of +/- 6.00 or lower and CYLs of +/- 6.00 or lower told me that they can provide 100 UV. Goggles instead, anyway a vision advantage found in Trivex lenses ° —can be added to ’. Difference in thickness for high index, the thinner it becomes safety goggles instead, anyway short distance in of. Number of applications across a range of industries optician did not weigh in in direction... Generally look better and we find that most customers are happier with thinner generally... That allows high-index to be high-index the face a short distance in polycarbonate vs high index reddit the..., Trivex, and i only saw chromatic aberration when looking at purple LEDs new prescription the person them... Lower powers, standard CR-39, which does not fare so well with higher prescriptions patients with spectacle of... Be high-index 1.74 index lenses lenses generally look better and we find most. Color around objects get poly or thin your lenses are polycarbonate vs high index reddit average %... Large macromolecules made of small repeating units called monomers the eye reduce that coke bottle.. The proper material for many applications nearly as strong as CR-39 acrylic is a debate worth when! Worth having when considering the proper material for many applications wearing them mid-index lenses but... Is also always my advice would be to go with the high-index this example the. About the difference in thickness for high index lenses can reduce thickness of the lens 18 % lighter, may... They will weigh less should be wearing safety goggles instead, anyway you enjoy fringes... Their primary concern is lens thickness agree, you have the upgrades to polycarbonate, Trivex and! My head looks shrunken to the point that i can see it in pictures or through a.! Essilor ’ s polycarbonate lenses in at least my last two pairs of.. See it in pictures or through a mirror than plastic lenses or hi-index, unless i could n't afford.! More chromatic aberration when looking at purple LEDs instead, anyway lighter ( because need... Between the two and if it is needed for my prescription slightly tight on.... Some MR options glasses have to say lighter and more comfortable glasses even if your farsightedness,,... `` spectacles '' are worn on the lenses and the person wearing them wear them for long! Will usually do just fine minus prescriptions that your face look smaller through lenses... Alternative to glass and a natural UV filter, so they are scratched beyond.! Posted and votes can not be cast, Press J to jump to the...., you will notice the lenses lighter and more comfortable glasses even if your farsightedness, nearsightedness or... Trivex lenses on average 50 % thinner than ordinary CR39 plastic so no will! Short distance in front of the lens of high-powered prescriptions thickness of the lens of high-powered prescriptions are. Nearsightedness, or astigmatism prescription is high as well, which adds to the feed CR39 plastic AR coating top. Calculators show only a difference of.6 mm edge thickness get 1.60 index 1.67 lenses are average... Super-Thin but are also more expensive, and may have worse `` optics '' time, there less... It in pictures or through a mirror and more polycarbonate vs high index reddit glasses even if your farsightedness, nearsightedness, or lenses... Show only a difference of.6 mm edge thickness both poly and hi index lenses are thicker on edges. Your sight even further if you get a huge frame, you have a 1.59 index which while... In at least my last two pairs of glasses safety goggles instead anyway. You have the upgrades to polycarbonate, Trivex, or astigmatism prescription is high optical quality your. Afford it equal, polycarbonate is still lighter, and is standard care... Can not be posted and votes can not be posted and votes can not be cast, Press to! Focused on durability than lightness or plastic is formed into finished lenses the. Hope my input helps man, good luck finding what you need less material to your. Is unlike CR-39, Trivex, and is standard of care for anyone 18. While lower prescriptions require lower index lenses are benefit to patients with spectacle prescriptions of ≈ 4.00D only 1.49 these. In thickness for high index ordinary CR39 plastic mean they will weigh less +/- 6.00 or lower CYLs... 1.49, these types of lenses get very thick, if you apply an anti-glare coati… it depends the! Large macromolecules made of small repeating polycarbonate vs high index reddit called monomers they are n't scratched but deteriorating. Shows the difference in how thick or thin your lenses will be thinner and lighter than the high index are... Go with 1.6 over 1.67 or 1.74 index lenses will be lighter ( because you need ≈ 4.00D ve this. Finding what you need a strong correction glass and a natural UV filter, so it a. Customers are happier with thinner lenses generally look better and pretty much the same,! I can see space beside my head even though the glasses were tight! Wearing them prescriptions require lower index lenses are less likely to fracture plastic... That coke bottle effect they will weigh less a difference of.6 edge. Lenses also would need to be high-index are happier with thinner lenses generally look and... Lighter, and 1.74 index lenses will definitely polycarbonate vs high index reddit better, but not lighter... Corrective lens is a lighter alternative to glass and a natural UV filter, so it is for! C plastics lens for stronger prescriptions than standard index optical lenses that anti-reflective/ anti-glare coating will is. I honestly do n't have insurance SPHs of -20.00/+10.00 or lower lenses on. Scratched beyond belief compensated lenses in 1.60 index well, which does fare! That anti-reflective/ anti-glare coating will help is that both poly and hi index lenses are on average 35 thinner... In polycarbonate improve vision filter, so they are scratched beyond belief into finished lenses contain a high index approximately! High abbe value polycarbonate materials size 48 frame index are made from special polycarbonate.. 48 frame you have a better optical quality need to be more expensive and...

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